- Usage in publication:
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- Wakefield marble*
- Modifications:
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- Named
- Dominant lithology:
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- Marble
- AAPG geologic province:
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- Piedmont-Blue Ridge province
Summary:
Name Wakefield marble applied to white finely crystalline marble that underlies and is interbedded with volcanic flows in western Piedmont of MD and York Co., PA. In part of area, it is beneath and infolded with albite-chlorite schist facies of Wissahickon formation. Occurs on northwestern side of Peach Bottom syncline. The Cockeysville marble underlies the Wissahickon on southeastern side of the syncline, but since equivalency of the two marbles is not established, new name is proposed. In some areas, grades into Silver Run limestone (new). Age given as Precambrian(?).
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
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- Wakefield marble*
- Modifications:
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- Areal extent
- Overview
- AAPG geologic province:
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- Piedmont-Blue Ridge province
Summary:
Unit described in Hanover-York district, PA, where it is apparently oldest formation in region and underlies the albite-chlorite schist facies of the Wissahickon. Estimated thickness in southern PA and adjacent MD is 100 ft.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
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- Wakefield marble*
- Modifications:
-
- Overview
- AAPG geologic province:
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- Piedmont-Blue Ridge province
Summary:
Wakefield described in Carroll and Frederick Cos., MD. Underlies Libertytown metarhyolite (new). No complete section of the Wakefield found. Estimated thickness near Union Bridge 150 ft.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
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- Wakefield marble
- Modifications:
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- Age modified
- AAPG geologic province:
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- Piedmont-Blue Ridge province
Summary:
Age of Wakefield marble is given as probably early Paleozoic.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
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- Wakefield Marble Member
- Modifications:
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- Revised
- AAPG geologic province:
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- Piedmont-Blue Ridge province
Summary:
Wakefield reduced in rank and assigned to the Sams Creek Formation. Unit is dominantly white to gray, massive to banded crystalline marble with interbeds of varicolored phyllite. Thickness ranges 1 to 150 m. Age listed as late Precambrian.
Source: GNU records (USGS DDS-6; Reston GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).